Analyzing a waveform
The oscilloscope shows the default FFT
screen. The lower main screen shows the
FFT waveform.
Use the
Vertical Position
knob of the
source channel to move the
FFT
waveform
up or down.
3.
Push
Source wfm
side-menu button to toggle the display of the source waveform (at the top of the screen)
On
or
Off
.
4.
Push the
Source
side-menu button and use
Multipurpose
knob to set the source to channel
1
,
2
,
3
, or
4
. The default
source is whatever channel was selected before opening the
FFT
window.
5.
Push the
Vertical Units
side-menu button
and use the
Multipurpose
knob to select
and click
dBV RMS
or
Linear RMS
.
Use the default
dBV RMS Vertical Units
scale to see a detailed view of multiple
frequencies, even if the frequencies have
very different amplitudes.
Use the
Linear RMS
vertical scale to see
an overall view of how all frequencies levels
compare to each other.
6.
Push the
Window
side-menu button and use the
Multipurpose
knob to select and click
Hanning
,
Rectangular
,
Hamming
,
or
Blackman-Harris
7.
Push the
Horizontal Center Position
side-menu button and use the
Multipurpose
knob to position the
FFT graph horizontally. The readout on the
side menu is the frequency of the waveform
point that is positioned on the center vertical
graticule. Use this to quickly measure FFT
‘spike’ frequencies.
60
TBS2000 Series User Manual